Tesla BMS #1 -Arduino Not Talking

Tesla BMS and Arduino failing to communicate!
This is an Arduino Due with ESP32 ARM board connected to two Tesla Model S BMS boards. The code on the Arduino is running but there’s no communication coming back. I blame the 5V-3.3V level shifter in the middle but more likely is me!
If you have an idea of what may be wrong please let me know below.
Code: https://github.com/collin80
Board and super-useful CAN shield (not used on this project but loads of use elsewhere): http://store.evtv.me/proddetail.php?prod=ArduinoDueCANBUS